Change dovecot hostname

[Sami Ketola]

Hi,

Looking at the source code it seems that the fqdn used in the lmtp received headers is 
fetched from environment variable DOVECOT_HOSTDOMAIN and if that is not defined 
gethostbyname() is used.

You can try setting that prior launching dovecot.

Sami


> On 19 Aug 2016, at 21:43, Scott W. Sander <scottwsx96 at gmail.com> wrote:
> 
> I have noticed that the name of my private server running dovecot appears
> in email headers rather than the public-friendly name of my server.
> 
> Is there a method to specify an alternate server name for the dovecot
> server to use for itself in the dovecot configuration files?  I performed a
> few Google searches and was not able to find the answer to my question.
> 
> -------
> 
> user at server1:~$ dovecot --version
> 2.2.9
> user at server1:~$ dovecot -n
> # 2.2.9: /etc/dovecot/dovecot.conf
> # OS: Linux 3.16.0-77-generic x86_64 Ubuntu 14.04.4 LTS ext4
> auth_mechanisms = plain login
> info_log_path = /var/log/dovecot.log
> log_path = /var/log/dovecot.log
> mail_location = maildir:/var/mail/vhosts/%d/%n
> namespace inbox {
>  inbox = yes
>  location =
>  mailbox Drafts {
>    special_use = \Drafts
>  }
>  mailbox Junk {
>    special_use = \Junk
>  }
>  mailbox Sent {
>    special_use = \Sent
>  }
>  mailbox "Sent Messages" {
>    special_use = \Sent
>  }
>  mailbox Trash {
>    special_use = \Trash
>  }
>  prefix =
> }
> passdb {
>  args = scheme=PLAIN username_format=%u /etc/dovecot/dovecot-users
>  driver = passwd-file
> }
> protocols = " imap lmtp pop3"
> service auth {
>  unix_listener /var/spool/postfix/private/auth {
>    group = postfix
>    mode = 0666
>    user = postfix
>  }
> }
> service imap-login {
>  inet_listener imaps {
>    port = 993
>    ssl = yes
>  }
> }
> service lmtp {
>  unix_listener /var/spool/postfix/private/dovecot-lmtp {
>    group = postfix
>    mode = 0600
>    user = postfix
>  }
> }
> service pop3-login {
>  inet_listener pop3s {
>    port = 995
>    ssl = yes
>  }
> }
> ssl = required
> ssl_cert = </etc/ssl/certs/server1_combined.pem
> ssl_key = </etc/ssl/private/server1_key.pem
> userdb {
>  args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n
>  driver = static
> }